Tbere is a charin in the singing of southern Bonga by negroes that never fails to please all. "Darkest Amerioa," the big negro exbibition wtaich will bu Keen at the Atbens Theater this evening, bas 20 singers and Bhouters, to say notbing of the bnndted and one otber interesting features. The brass band and orcbeetra, the military company and all the people wbo take part in tbe performance are genuine sontbern negroes. Tbe object of tbe exbibition is to sbow tbe home life of tbe American negro as it was on the old plantation, before the war and as it is at the present. John W. Vogel, the lorganizerof tbis novel ezbibition, has made a stndy of tbe negro charaoter, and tbe performance ia given ander bis personal anpervieion.